Stock Based Compensation (Narrative) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			12 Months Ended		3 Months Ended	12 Months Ended	3 Months Ended					12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Restricted Stock Employees	Jun. 30, 2014 Restricted Stock Employees	Jun. 30, 2014 Restricted Stock Non Employee Directors	Sep. 30, 2014 Performance Shares	Jun. 30, 2014 Performance Shares	Sep. 30, 2014 Restricted Stock and Restricted Stock Units	Sep. 30, 2013 Restricted Stock and Restricted Stock Units	Sep. 30, 2014 Employee Stock Option	Sep. 30, 2013 Employee Stock Option	Sep. 30, 2014 Restricted stock units Employees	Jun. 30, 2014 Restricted stock units Non Employee Directors	Dec. 02, 2010 2010 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock that may be issued														5,250
Common stock granted, vesting period			3 years	3 years	1 year
Common stock granted, shares			158	214	11	116	131					51	32
Upper limit of target grant, shares						203	196
Performance-vested restricted stock units, vesting percentage at the end of third year						100.00%	100.00%
Stock-based compensation expense	$ 1,129	$ 798						$ 1,103	$ 716	$ 19	$ 79
Total unrecognized compensation cost								$ 8,733